845909366819 has 32 divisors (see below), whose sum is σ = 966605011200. Its totient is φ = 733222080640.

The previous prime is 845909366777. The next prime is 845909366821. The reversal of 845909366819 is 918663909548.

It is a cyclic number.

It is not a de Polignac number, because 845909366819 - 2²⁰ = 845908318243 is a prime.

It is a super-2 number, since 2×845909366819² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (845909366839) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10781072 + ... + 10859250.

It is an arithmetic number, because the mean of its divisors is an integer number (30206406600).

Almost surely, 2^845909366819 is an apocalyptic number.

845909366819 is a deficient number, since it is larger than the sum of its proper divisors (120695644381).

845909366819 is a wasteful number, since it uses less digits than its factorization.

845909366819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78643.

The product of its (nonzero) digits is 100776960, while the sum is 68.

The spelling of 845909366819 in words is "eight hundred forty-five billion, nine hundred nine million, three hundred sixty-six thousand, eight hundred nineteen".